Negative numbers and opposite numbers

Negative numbers and opposite numbers

Lessons

• Negative numbers: any numbers to the left of zero on a number line.
• Numbers increase in value as we move up/right on a number line.
• Opposite numbers: numbers with the same distance from 0, but on the opposite side of a number line.
• To find an opposite number, we attach a negative sign to the given number.
• Two LIKE signs give a positive sign.
• Two UNLIKE signs give a negative sign.
  • Introduction
    Introduction to Negative Numbers and Opposite Numbers
    a)
    What is a negative number?

    b)
    What is an opposite number?

    c)
    How to find an opposite number algebraically?


  • 1.
    Understanding Negative Numbers
    For each of the following pair of integers, which integer has a greater value?
    a)
    8-8 and 2-2

    b)
    00 and 3-3


  • 2.
    Analyzing Opposite Numbers
    Fill in the following table:
    a)

    Scenario

    Opposite of the Scenario

    Description

    Number

    Description

    Number

    Billy lost $5


    b)

    Scenario

    Opposite of the Scenario

    Description

    Number

    Description

    Number

    Sylvia's flight was delayed by 2 hours.


    c)

    Scenario

    Opposite of the Scenario

    Description

    Number

    Description

    Number

    Tim bought 3 cupcakes.



  • 3.
    Solving Opposite Numbers Graphically and Algebraically
    Find the opposite of the given numbers:
    i. Graphically (using a number line)
    ii. Algebraically
    a)
    7 7

    b)
    4-4

    c)
    0 0